Has anyone done research to see which accounts with large amounts are being withdrawn before major drops?

Seems it would be something that can be tracked on block explorers…. To see which dates investors with large sums of money are moving money to and from exchanges right before major corrections or bull runs. I have no idea where to start researching this but wouod like to learn because it may give us heads up before and after major moves in the markets.I’m talking big money…. Tens of millions of dollars I’m trying to follow the money because they control the markets for the most part. They never lose!!! They also would rather their money not be on exchanges. Maybe some kind of pattern that can be found. I assume a lot of them would withdraw to personal accounts or to Coinbase to real USD also go from one exchange to another that allows them to short the market. Like going from binance to bitfinex.